Stumbled upon
Looks like the same switch as elec-trak ?
http://cgi.ebay.com/ebaymotors/Vintage-42-50-Chevrolet-Stoplight-Switch-NORS_W0QQitemZ320063218060QQihZ011QQcategoryZ42606QQrdZ1QQcmdZViewItem
VINTAGE 1942-50 CHEVROLET STOPLIGHT SWITCH. IT IS ALSO USED ON
1950-55 CADILLAC / 1941-55 CHEVY TRUCK / 1949-59 GMC / 1957-65 IHC /
1951-58 OLDS W/O POW. THIS ITEM IS NORS AND IN BOX. ECHLIN PART # SL128
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